Re: Chasing Rough idle...compression?

Posted by PackardV8 On 2011/5/21 6:10:35

Based on repairs outlined in post 1 above:

Valve lash too tite or very loose and worn timing chain or loose motor mounts come to mind.

Not that it matters at this point but compression checks should be done with ALL spark plugs removed.

How do the sparking plugs look???? Are they sooty or brownish or greyish????

What is the rear axle ratio?????? If it is in the 4.00 range then that could be why it's running out breath at 70 mph.

Float level in carb mite be way too low.